SIMULATION OF HIGH-SPEED SPALL IMPACTS ON MULTIPLE-LAYER BARRIERS USING THE CLUSTER DYNAMICS METHOD
B. L. Voronin, M. V. Zdorova, S. V. Kopkin, M. V. Vetchinnikov, I. A. Davydov, E. A. Pronin
VANT. Ser.: Mat. Mod. Fiz. Proc 2012. Вып.1. С. 43-51.
Many engineering problems require the knowledge of the resistances of some structures to impact and penetration. Currently, we have a limited ability of experimentally simulating high-speed impacts (impacts at a speed of sim 4-7 km/s), first, because of high costs of such simulations and, second, because of a small amount of recorded data that does not allow tracking the dynamics of the whole process in the system of interest. In view of the reasons above and capabilities of the modern computing systems, it becomes clear that numerical simulations are very useful for studying the impact problems in more details. Results of simulations may provide the profound understanding of strains in structures. The RFNC-VNIIEF Department of Mathematics has been studying the problem of high-speed penetration of barriers by projectiles beginning from the 1990's. Various mathematical techniques were used for 2D and 3D simulations of the model (or similar) experiments. The paper presents MoDyS code for solving with the cluster dynamics method the problem of a steel ball impacting on a multiple-layer barrier at a high-speed. Results of simulations using the method and comparison with the available results of experiments and simulations by other codes are presented.Keywords: MoDyS, cluster dynamics, breaking through barriers, Mie-Grueneisen potential, monocrystal, polycrystal, arithmetic accelerators.
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